I was traveling on the bus,gazing out the window at the cars passing by in the next lane. I noticed one car in particular. There was a little girl sitting in the passenger seat. She was leaning against the window and writing something on the clouded glass with her finger. It looked like a maths equation.

3m ql3 +1.

Our eyes met and the girl waved at me excitedly. I smiled and waved back. Just then,the car turned at an intersection and went a different way.

"What a smart little girl." I thought.